Samsung Phone Adapted to Run on Urine Power

Scientists working at the Bristol Robotics Laboratory have recharged a Samsung battery using human urine.

Dr Ioannis Ieropoulos from UWE Bristol said that "no-one has harnessed
power from urine to do this so it's an exciting discovery. Using the ultimate
waste product as a source of power to produce electricity is about as eco as it
gets."

"One product that we can be sure of an unending supply is our own urine. By
harnessing this power as urine passes through a cascade of microbial fuel cells
(MFCs), we have managed to charge a Samsung mobile phone. The beauty of this
fuel source is that we are not relying on the erratic nature of the wind or the
sun; we are actually re-using waste to create energy."

"So far the microbial fuel power stack that we have developed generates
enough power to enable SMS messaging, web browsing and to make a brief phone
call."

The Microbial Fuel Cell is an energy converter, which turns organic matter
directly into electricity, via the metabolism of live microorganisms.
Essentially, the electricity is a by-product of the microbes' natural life
cycle, so the more they eat things like urine, the more energy they generate and
for longer periods of time; so it's beneficial to keep doing it.

The electricity output from MFCs is relatively small and so far they have
only been able to store and accumulate these low levels of energy into
capacitors or super-capacitors, for short charge/discharge cycles. This is the
first time they have been able to directly charge the battery of a device such
as a mobile phone though.

The project has been funded by the Engineering and Physical Sciences Research
Council (EPSRC), the Gates Foundation and the Technology Strategy Board.

The scientists believe that the technology has the future potential to be
installed into domestic bathrooms to harness the urine and produce sufficient
electricity to power showers, lighting or razors as well as mobile phones.

Dr Ieropoulos concludes, "We are currently bidding for funding to work
alongside partners in the US and S. Africa to develop a smart toilet."

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